- on Computer/Software/Internet
- Published in issue 7/2012 on page 110
I’ve Got the USB Power
But how much in milliamps?
This small tool allows you to monitor current consumed by any USB device plugged into your PC, showing the value on a voltmeter module. Alternatively, why not trace it on the oscilloscope?
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CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.
R1 = 0.05Ohm 1W 1%, Welwyn OAR1-R050FI (Farnell # 1200363)
R2 = 18kOhm (SMD 0805)
R3 = 2.00kOhm (SMD 0805)
C1 = 100nF X7R (SMD 0805)
IC1 = TSC101A, TSOP-5 case
K1 = USB-A male connector (plug), PCB mount, through hole
K2 = USB-A female connector (socket), PCB mount, through hole
MOD1 = Voltcraft 70004 LCD panel meter module; Conrad-Uk.com # 121065-89
PCB # 110568-1